<template>
  <view>
    <!-- 自定义搜索组件 -->
    <my-search @mySearchClick="gotoSearch" :bgColor="'red'" :radius="10"></my-search>
    <!-- 自定义搜索组件结束 -->
    <view class="scroll-view-container">
      <scroll-view class="left-scroll-view" scroll-y="true" :style="{height: winH+'px'}">
        <block v-for="(item, i) in cateList" :key="i">
          <view :class="['left-scroll-view-item',i===active?'active':'']" @click="activeChanged(i)">
            {{item.cat_name}}
          </view>
        </block>
      </scroll-view>

      <scroll-view class="right-scroll-view" scroll-y="true" :style="{height: winH+'px'}" :scroll-top="scrollTop">
        <view class="right-scroll-view-item" v-for="item2, i2 in cateLevel2" :key="i2">
          <!-- 二级 -->
          <view class="cate-lv2-title">
            / {{item2.cat_name}} /
          </view>
          <!-- 三级 -->
          <view class="cate-lv3-list">
            <view class="cate-lv3-item" v-for="(item3,i3) in item2.children" @click="gotoGoodsList(item3)">
              <image :src="item3.cat_icon" mode=""></image>
              <text>{{item3.cat_name}}</text>
            </view>
          </view>
        </view>
      </scroll-view>
    </view>
  </view>
</template>

<script>
  import badgeMix from '../../mixins/tabbar-badge.js'
  export default {
    mixins:[badgeMix],
    data() {
      return {
        winH: 0, //当前设备可用的高度
        cateList: [], //分类列表数据
        active: 0, //默认激活项
        cateLevel2: [], // 二级分类列表
        scrollTop: 0, //重置到顶部
      };
    },
    onLoad() {
      const sysInfo = uni.getSystemInfoSync()
      console.log(sysInfo)
      this.winH = sysInfo.windowHeight-50

      this.getCateList()
    },
    methods: {
      //获取分类列表数据
      async getCateList() {
        const {
          data: res
        } = await uni.$http.get('/api/public/v1/categories')
        if (res.meta.status !== 200) return uni.$showMsg()
        this.cateList = res.message
        // 为二级分类赋值
        this.cateLevel2 = res.message[0].children
      },

      activeChanged(i) {
        this.active = i
        // 为二级分类列表重新赋值
        this.cateLevel2 = this.cateList[i].children
        this.scrollTop = this.scrollTop === 0 ? 0.01 : 0
      },
      // 点击三级分类项跳转到商品列表页面
      gotoGoodsList(item3) {
        uni.navigateTo({
          url: '/subpkg/goods_list/goods_list?cid=' + item3.cat_id
        })
      },
      
      gotoSearch(){
        uni.navigateTo({
          url:'/subpkg/search/search'
        })
      }
    }
  }
</script>

<style lang="scss">
  .scroll-view-container {
    display: flex;

    .left-scroll-view {
      width: 120px;
    }
  }

  .left-scroll-view-item {
    background: #F7F7F7;
    line-height: 60px;
    text-align: center;
    font-size: 12px;

    &.active {
      background: #fff;
      position: relative;

      &::before {
        content: '';
        position: absolute;
        left: 0;
        top: 50%;
        transform: translateY(-50%);
        width: 3px;
        height: 50%;
        background: #FF4536;
        display: block;
      }
    }
  }

  .cate-lv2-title {
    text-align: center;
    padding: 20px 0;
    font-size: 14px;
    font-weight: bold;
  }

  .cate-lv3-list {
    display: flex;
    flex-wrap: wrap;

    .cate-lv3-item {
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      width: 33.33%;
      margin-bottom: 10px;

      image {
        width: 60px;
        height: 60px;
      }

      text {
        font-size: 12px;
      }
    }
  }
</style>
